There isn't one yet there are only 3 so far
Its going to be called Chestnut King i loved the seris im only in 4th grade loved it
There will not be a fourth book in the series because the series is a trilogy.
THere is no fourth book. The series of Seekers is composed of three books.
It is already out and it is called Closer 4th book of the series.
Halo: Ghost of Onyx is the 4th book in the Halo series.
It is the 4th book in the Twilight series.
The fourth book of the Power of Three series is called Eclipse.
Breaking Dawn is the 4th book in the Twilight series. It is already out. Hope this information was helpful. X
Probably not
There is no 4th book. Mockingjay was the last
In the Warriors series, the4th apprentice will be the first book of the 4th series.
Untamed is the 4th book. http://www.houseofnightseries.com/